Exchange - Message Size Limit

Last Updated: 07/08/2014

Message Size Limitations

Messages sent from your Exchange account are limited to 25MB a message.

Alternate Ways to Send Files

There are a few alternatives to e-mail, when attempting to send files that exceed 25MB. OIT recommends the following:

Send Failure Error Messages

All e-mail clients behave slightly differently; however, when a message fails to send the following will likely occur:

  1. An error pop-up will appear in your e-mail client, informing you that the message was unsuccessful.
  2. You will recieve an e-mail from Mail Delivery System with the subject, Undeliverable: {Failed Message Subject}. The message will appear similar to the following image:
    delivery fail image